/**
 * Copyright (C) 2013- Iordan Iordanov
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 * USA.
 */


package com.undatech.opaque;

import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.text.Html;
import android.text.Spanned;

public class MessageDialogs {

	/**
	 * Converts a given sequence of bytes to a human-readable colon-separated Hex format. 
	 * @param bytes
	 * @return
	 */
	public static String toHexString(byte[] bytes) {
		char[] hexArray = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
		char[] hexChars = new char[bytes.length * 3];
		int v, j;
		for (j = 0; j < bytes.length - 1; j++) {
			v = bytes[j] & 0xFF;
			hexChars[j*3] = hexArray[v/16];
			hexChars[j*3 + 1] = hexArray[v%16];
			hexChars[j*3 + 2] = ":".charAt(0);
		}
		v = bytes[j] & 0xFF;
		hexChars[j*3] = hexArray[v/16];
		hexChars[j*3 + 1] = hexArray[v%16];
		return new String(hexChars);
	}

	/**
	 * Displays a generic dialog.
	 * @param context
	 * @param alertTitle
	 * @param alert
	 * @param ok
	 */
	private static void displayDialog(final Context context,
										int alertTitleID,
										int alertID,
										DialogInterface.OnClickListener ok) {
		boolean show = true;
		if ( context instanceof Activity ) {
			Activity activity = (Activity) context;
			if (activity.isFinishing()) {
				show = false;
			}
		}
		if (show) {
			Builder builder = new Builder((Activity)context);
			builder.setCancelable(false);
			builder.setTitle(alertTitleID);
			Spanned text = Html.fromHtml(context.getString(alertID));
			builder.setMessage(text);
			builder.setPositiveButton("OK", ok);
			builder.show();
		}
	}

	/**
	 * Displays an info dialog which is dismissed on pressing OK.
	 * @param context
	 * @param info
	 */
	public static void displayMessage(final Context context, int infoId, int titleId) {
		displayDialog(context, titleId, infoId, new DialogInterface.OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
			}
		});
	}

	/**
	 * Displays an error dialog that dismisses the calling activity on pressing OK.
	 * @param context
	 * @param error
	 */
	public static void displayMessageAndFinish(final Context context, int messageId, int titleId) {
		displayDialog(context, titleId, messageId, new DialogInterface.OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				((Activity)context).finish();
			}
		});
	}
}
